Nailing strip



Patented Jan. 31, 1928.

PATENT"; one! DALE R. BARD, or BRYAN, oHIo.

NAILING STRIP.

Application filed May 7,

This invention relates to cleats or nailing strips for sealing the spaces between roofing sheets or securing prepared roofing in place by nailing.

An object of this invention is to provide a simple and inexpensive sheet metal fastener, cleat or nailing strip for efliciently and satisfactorily effecting a water and weathertight connection between roofing sheets, and

in which is soconstructed that when secured in place substantially the same pressure is exerted on all edges of each unit or cleat.

Sheet metal nailing strips have been in use for some time, but many are objection able, because if care is not taken to drive the nails in straight, the same pressure on all edges may not be had with disadvantageous results and militating against a secure weather-resistant connection. Many of these devices are quite expensive, and are. therefore, impractical commercially for the reason that competition in this field is keen, and the cost must be kept within more or less de fined limits. I

According to my invention, a fastener is provided which may be manufactured at a minimum cost, but is so designed as to secure a reliable and etficient water-proof and weather-resistant joint, requiring no unusual care. in nailing to uniformly force all edges into tight engagement with the material to which it is attached. The simplicity of construction and sturdiness of design are outstanding features of theinvention.

For purposes of illustration the invention is shown on the accompanying drawings, in which:

Fig. 1 is a top plan view of the nailing strip showing the manner in which it is used; Fig. 2 is a transverse section on the line 22 of F ig. 1 showing the nail removed; Fig. 3 is a perspective view of one of the fasteners, and Fig. 4 is a diagrammatic view to show the curvature of the nail-receiving portion.

The illustrated embodiment of the invention comprises a beam 1 on which the waterproof roofing sheets 2 are laid in the usual manner. In laying the roofing sheets 2 a space 3 is usually left between contiguous sheets, and in order to seal this space a nailing strip 4 is applied to cover and seal the space or groove 3 and provide a weatherresistant and water-proof seal. Ordinarily, each nailing strip is about 30 inches in length and is made of relatively light gage sheet metal, being composed of a number of in- 1 1927. Serial no. 189L495.

dividual cleats or fasteners 5, which are integrally joined to each other.

Each cleat of the nailing strip is secured in place by nails 6 extending through holes 7 in the central portion thereof. The nailreceiving portion of each cleat comprises a raised portion, thereby making the cleats of concavo-convex form. As shown, the nailreceiving portion 9 converges from the opposite ends toward the central part and is symmetricallyv curved.

As shown in Fig. 4 a line 9 drawn tangent to the center of the nailreceiving portion forms with a chord 10 from the center of the nail-receiving portion to either end an angle of approximately 12. It will thus be seen that the nail-receiving portion is spaced but a slight distance away from the surface to which it is attached, butis sufliciently elevated so that when force is applied downwardly on the upper portion thereof, it is sufficient to bring all edges thereof into intimate sealing engagement with the surface, as will hereinafter be more clearly described.

7 Depending from opposite sides of the nailreceiving portion 8 are vertically disposed outwardly inclined sides 11, the lower edges of which are normally curved upward and are forced ino the roofing material when the nail 6 is driven into place. The sides 11 form with the adjacent outer edge of the nail-receiving portion a sector, so that it is manifest when the top of the cleat is struck with a hammer the force will tend to force the sides inclinedly downward into the roofing material, and at the same time the ends of the cleat will also be forced tightly into engagement with the material.

An outstanding advantage of this cleat is that when secured in place, alledges of the cleat receive substantially the same pressure, and thereby produce .an efficient weatherproof and water-tight connection. Th arcuate or curved construction militates against liability of water freezing under the nails and loosening them.

While I have shown and described a construction which is the best form known to me at the present time, it is to b understood that numerous changes in details of construction and arrangement and choice of materials may be effected without departing from the spirit of the invention, especially as defined in the appended claim;

What I claim as new and desire to secure by Letters Patent is;

A sheet metal fastener having a rectangular base, a flat, longitudinally and symmetrieally curved nail-receiving portion, the curvature from opposite ends being such that a line tangent to the center thereof forms with a chord from such center to either end an angle of the order of 12, said nail-receiving portion diverging uniformly in opposite directions from the central part thereof and sides depending downwardly and outwardly from said nail1'eceiving portion.

In testimony whereof I have hereunto signed my name to this specification,

DALE R. BARD. 

